Questions and Answers
What are the three domains of life?
Bacteria, Archaea, and Eukarya
These domains are based on:
The cellular composition of organisms.
Which of the following statements is true about bacteria?
Which of the following is true about Archaea?
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Which of the following statements is true about Eukarya?
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What are the requirements of living things?
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What are the 4 kingdoms?
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What is the binomial naming system?
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What are Dichotomous Keys?
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What are the three characteristics used to classify organisms?
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What are the types of symmetry?
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What is classification?
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Study Notes
Three Domains of Life
- Three domains include Bacteria, Archaea, and Eukarya.
- Domains are based on the cellular composition of organisms.
Bacteria
- Prokaryotic and unicellular, lacking a membrane-bound nucleus.
- Reproduce asexually; can be heterotrophic (absorption) or autotrophic (chemosynthesis/photosynthesis).
- Movement facilitated by flagella.
Archaea
- Also prokaryotic and unicellular, similar to bacteria in structure.
- Reproduce asexually, often autotrophic by chemosynthesis or heterotrophic by absorption.
- Features unique rRNA base sequences and distinctive membrane/cell wall chemistry.
Eukarya
- Composed of eukaryotic organisms, ranging from unicellular to multicellular forms.
- Possess a membrane-bound nucleus and can reproduce sexually.
- Exhibit diverse phenotypes and nutritional strategies; each kingdom shows unique specializations.
- Flagella, if present, follow a 9+2 structural organization.
Requirements for Living Organisms
- Essential characteristics include movement, respiration, sensitivity, growth, reproduction, excretion, and nutrition.
Four Kingdoms of Life
- Animalia, Plantae, Fungi, and Protista are the main kingdoms within the eukaryotic domain.
Binomial Naming System
- Utilizes a two-part naming system for species, ensuring each has a unique scientific name.
- First part is the genus; second part is the specific epithet.
Dichotomous Keys
- Classification tool used for identifying organisms through a series of choices between two options.
Characteristics for Classification
- Classification of organisms based on physical characteristics, reproductive methods, and molecular sequencing.
Types of Symmetry
- Radial symmetry allows symmetry in multiple planes.
- Bilateral symmetry is only symmetric along one plane.
Classification Definition
- The systematic arrangement of animals and plants into taxonomic groups based on observed similarities.
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Description
Test your knowledge of the three domains of life: Bacteria, Archaea, and Eukarya. These flashcards cover essential definitions and characteristics of these domains, with a focus on their cellular composition and distinctions. Perfect for biology students or anyone interested in understanding the fundamental classifications of life.
